MSS SP-75-2014
High-Strength, Wrought,
Butt-Welding Fittings
Standard Practice
Developed and Approved by the
Manufacturers Standardization Society of the
Valve and Fittings Industry, Inc.
127 Park Street, NE
Vienna, Virginia 22180-4602
Phone: (703) 281-6613
Fax: (703) 281-6671
E-mail: standards@mss-hq.org
www.mss-hq.org
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MSS
STANDARD PRACTICE
SP-75
This MSS Standard Practice was developed under the consensus of the MSS Technical Committee 113 and the MSS
Coordinating Committee. Input from the user community and the Regulatory body responsible for pipeline safety
compliance was requested and the task group assigned to revising this Standard Practice had very important input from
these groups in preparing this edition of SP-75. The content of this Standard Practice is the resulting efforts of competent
and experienced volunteers to provide an effective, clear, and non-exclusive standard that will benefit the industry as a
whole. This MSS Standard Practice describes minimal requirements and is intended as a basis for common practice by
the manufacturer, the user, and the general public. The existence of an MSS Standard Practice does not in itself preclude
the manufacture, sale, or use of products not conforming to the Standard Practice. Mandatory conformance to this
Standard Practice is established only by reference in other documents such as a code, specification, sales contract, or
public law, as applicable. MSS has no power, nor does it undertake, to enforce or certify compliance with this document.
Any certification or other statement of compliance with the requirements of this Standard Practice shall not be
attributable to MSS and is solely the responsibility of the certifier or maker of the statement.
“Unless indicated otherwise within this MSS Standard Practice, other standards documents referenced to
herein are identified by the date of issue that was applicable to this Standard Practice at the date of
approval of this MSS Standard Practice (see Annex A). This Standard Practice shall remain silent on the
validity of those other standards of prior or subsequent dates of issue even though applicable provisions
may not have changed.”
By publication of this Standard Practice, no position is taken with respect to the validity of any potential claim(s) or of
any patent rights in connection therewith. MSS shall not be held responsible for identifying any patent rights. Users are
expressly advised that determination of patent rights and the risk of infringement of such rights are entirely their
responsibility.
In this Standard Practice, all text, notes, annexes, tables, figures, and references are construed to be essential to the
understanding of the message of the standard, and are considered normative unless indicated as “supplemental”. All
appendices, if included, that appear in this document are construed as “supplemental”. Note that supplemental
information does not include mandatory requirements.
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This Standard Practice has been substantially revised from the previous 2008 edition. It is
suggested that if the user is interested in knowing what changes have been made, that direct
page by page comparison should be made of this document and that of the previous edition.
Non-toleranced dimensions in this Standard Practice are nominal unless otherwise specified.
Excerpts of this Standard Practice may be quoted with permission. Credit lines should read ‘Extracted from
MSS SP-75-2014 with permission of the publisher, Manufacturers Standardization Society of the Valve and
Fittings Industry'. Reproduction and/or electronic transmission or dissemination is prohibited under copyright
convention unless written permission is granted by the Manufacturers Standardization Society of the Valve and
Fittings Industry Inc. All rights reserved.
Originally Approved: September 1970
Originally Published: November 1970
Current Edition Approved: April 2014
Current Edition Published: September 2014
MSS is a registered trademark of Manufacturers Standardization Society of the Valve and Fittings Industry, Inc.
Copyright ©, 2014 by
Manufacturers Standardization Society
of the
Valve and Fittings Industry, Inc.
Printed in U.S.A.
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MSS
STANDARD PRACTICE
SP-75
TABLE OF CONTENTS
SECTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
PAGE
SCOPE .......................................................................................................................................................... 1
PRESSURE RATINGS ................................................................................................................................. 1
SIZE .............................................................................................................................................................. 2
DESIGN PROOF-TEST ............................................................................................................................... 2
HYDROSTATIC TESTING ......................................................................................................................... 3
MATERIALS ................................................................................................................................................ 3
CHEMICAL COMPOSITION ..................................................................................................................... 3
TENSILE PROPERTIES .............................................................................................................................. 4
HEAT TREATMENT ................................................................................................................................... 5
TRANSVERSE GUIDED-WELD BEND-TESTS ....................................................................................... 5
NOTCH-TOUGHNESS PROPERTIES ....................................................................................................... 6
FITTING DIMENSIONS ............................................................................................................................. 6
TOLERANCES FOR WELDING FITTINGS .............................................................................................. 6
MANUFACTURE ........................................................................................................................................ 7
NONDESTRUCTIVE EXAMINATION (NDE) .......................................................................................... 8
INSPECTION ............................................................................................................................................... 8
MARKING ................................................................................................................................................... 9
TABLE
1
2
3
4
5
6
7
8
9
Maximum Limit of Chemical Elements ...................................................................................................... 14
Tensile Requirements .................................................................................................................................. 14
Tolerances ................................................................................................................................................... 15
Dimensions of Long-Radius Elbows .......................................................................................................... 16
Dimensions of 3R Elbows ........................................................................................................................... 17
Dimensions of Straight Tees ....................................................................................................................... 18
Dimensions of Reducing Outlet Tees .......................................................................................................... 19
Dimensions of Caps ..................................................................................................................................... 22
Dimensions of Reducers .............................................................................................................................. 23
1
Recommended Bevel for Wall Thicknesses (T) at End of Fitting, 0.75 in. or Less .................................... 11
2
Recommended Bevel for Wall Thicknesses (T) at End of Fitting, Greater than 0.75 in. ........................... 11
3
Acceptable Design for Unequal Wall Thickness ........................................................................................ 12
4
Traverse Face and Root-Bend Test Specimens ........................................................................................... 12
5
Guided-Bend Test Jig .................................................................................................................................. 13
X2-1 Longitudinal-Bead Underbead Cracking Test Specimen ............................................................................ 28
ANNEX
A
Referenced Standards and Applicable Dates ............................................................................................. 25
APPENDIX
X1
X2
X3
Supplementary Requirements .................................................................................................................... 26
Longitudinal-Bead Underbead Cracking Test ............................................................................................ 28
Recommendations for Segmenting ............................................................................................................ 29
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FIGURE
MSS
STANDARD PRACTICE
SP-75
HIGH-STRENGTH, WROUGHT, BUTT-WELDING FITTINGS
1.
SCOPE
2. PRESSURE RATINGS
1.1 This Standard Practice covers factorymade, seamless and electric welded carbon and
low-alloy steel, butt-welding fittings for use in
high pressure gas and oil transmission and
distribution systems; including pipelines,
compressor stations, metering and regulating
stations, and mains.
2.1 The allowable internal-pressure ratings for
pipe fittings designed in accordance with this
Standard Practice shall be calculated as for
straight seamless pipe (or welded pipe with a
joint efficiency factor of 1.0) of equivalent
grade, diameter and wall thickness in
accordance with the rules established in the
applicable sections of ASME B31 Codes.
1.2 This
Standard
Practice
governs
dimensions, tolerances, ratings, testing,
materials, chemical and tensile properties, heat
treatment,
notch
toughness
properties,
manufacture, inspection and marking for highstrength, butt-welding fittings NPS 60 and
smaller. Dimensional requirements for NPS 14
and smaller are provided by reference to ASME
B16.9.
2.2 All fittings produced in accordance with
this Standard Practice shall be designed to
withstand a field hydrostatic test pressure, after
installation, at a pressure level equivalent to that
required to develop a hoop stress equal to the
specified minimum yield strength for pipe of
equivalent grade and wall thickness based on
Barlow’s Formula, without failure, leakage, or
impairment of serviceability. Barlow’s formula
is defined as:
1.3 The term “welding fittings” applies to buttwelding fittings such as elbows, segments of
elbows, return bends, caps, tees, single or
multiple-outlet extruded headers, reducers, and
extensions and transition sections(1). Girth weld
requirements are outside the scope of this
Standard Practice and are covered by the
applicable ASME B31 Code for Pressure Piping
and/or customer specifications.
P 
Where:
P = internal design pressure, psig;
S = specified minimum yield strength of the
pipe, psi;
t = nominal wall thickness of the pipe, inches;
D = outside diameter of the pipe, inches.
1.4 Fittings may be made to special
dimensions, sizes, shapes, and tolerances, or of
wrought materials other than those covered by
this Standard Practice by agreement between the
manufacturer and the purchaser. When such
fittings meet all other stipulations of this
Standard Practice they shall be considered as
being in partial compliance therewith, providing
they are appropriately marked.
2.3 By agreement between the manufacturer
and the purchaser, fittings may be tested at a
higher pressure providing the manufacturer is
notified of the test pressure to be used.
2.4 The design shall take into consideration
performance requirements prescribed above as
well as additional factors dictated by the shape
of the part.
1.4.1 Fittings manufactured in partial
compliance, as provided in Section 1.4, shall
be identified with “Part” following the
respective grade designation.
2.5 The design of fittings may be established
by mathematical analyses contained in
nationally recognized pressure vessel or piping
codes or, at the manufacturer’s option, by proof
testing in accordance with Section 4.
NOTE: (1) Lengths of extensions and transitions
as agreed upon by purchaser and manufacturer.
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D
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MSS
STANDARD PRACTICE
The design of fittings that cannot be qualified by
mathematical analyses shall be established by
proof testing in accordance with Section 4.
SP-75
The testing factor, f, based on the number of
specimen tests performed in the table below is
used in the computed test equations:
3. SIZE
Number of Tests
1
2
3
The nominal size of the fittings refers to the
nominal O.D. of the pipe to which it is attached.
4. DESIGN PROOF-TEST
Testing Factor, f
1.10
1.05
1.00
NOTE: Tests of similarly proportioned fittings
that meet the requirements specified in Section
4.4 may be combined to establish the test factor
applied to a set of fittings.
4.1 Proof tests shall be made as set forth in this
Standard Practice when the manufacturer
chooses proof testing to qualify the fitting
design. The proof test shall be based on the
computed burst pressure of the fitting and its
connecting piping as defined in Section 4.3. A
factory-made segmented elbow that has a proof
test on a geometrically similar 90-deg elbow
need not be tested separately.
The test shall be taken to rupture or held at or
above the computed minimum proof pressure for
a period of at least three (3) minutes. The test is
successful if for each of the tests, the fitting
withstands without rupture a proof test pressure
at least equal to the computed minimum:
P = 2 f St/D
4.2 Test Assembly Requirements:
Where:
4.2.1 Fittings that have the same basic design
configuration and method of manufacture shall
be selected from production for testing and
shall be identified as to material, grade and lot,
including heat treatment. They shall be
inspected for dimensional compliance to this
Standard Practice.
D = specified outside diameter of pipe;
f = testing factor from table listed in
Section 4.3;
P = computed minimum proof test pressure
for fitting;
4.2.2 Straight seamless or welded pipe whose
calculated bursting strength is at least as great
as the proof test pressure as calculated in
Section 4.3, shall be welded to each end of the
fitting to be tested. Pipe sections may have the
nominal wall greater than the thickness
indicated by the fitting markings. That greater
thickness shall not exceed 1.5 times the
nominal pipe wall thickness of the pipe that the
fitting marking identifies. Any internal
misalignment greater than 0.06 in. shall be
reduced by taper boring at a slope not
exceeding 1:3 (18°). Any other unequal wall
welding preparation shall be in accordance with
Figure 3. The minimum length of pipe sections
for closures shall be one-half pipe O.D. for
greater than NPS 14 and one pipe O.D. for NPS
14 and smaller.
S
= actual tensile strength of the test fitting,
determined on a specimen representative
of the test fitting, which shall meet the
tensile strength requirements of the
applicable material of Section 6;
t
= nominal pipe wall thickness of the pipe
that the fitting marking identifies.
4.4 It is not necessary to conduct an individual
test of fittings with all combinations of sizes,
wall thicknesses, and materials. A successful
proof test on one representative fitting may
represent others to the extent described in
Sections 4.4.1, 4.4.2, 4.4.3, and 4.4.4.
4.4.1 One test fitting may be used to qualify
similarly proportioned fittings with a size range
from one-half to twice that for the tested fitting.
The test of a non-reducing fitting qualifies
reducing fittings of the same pattern. The test
of a reducing fitting qualifies reductions to
smaller sizes.
4.3 The test fluid shall be water or other liquid.
Hydrostatic pressure shall be applied to the
assembly. At least three (3) proof tests for each
fitting, joint size, or configuration are
recommended.
2
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MSS
STANDARD PRACTICE
SP-75
4.4.2 One test fitting may be used to qualify
similarly proportioned fittings with t⁄D ranges
from one-half to three times that for the tested
fitting.
(e) Length of time from test initiation to the
time of burst, or the hold time at or above
the computed target pressure;
4.4.3 The pressure retaining capacity of a
geometrically identical fitting made of various
grades of steel as listed in Section 6 will be
directly proportional to the tensile properties of
the materials, provided the yield-to-tensile ratio
is 0.90 or less. Therefore, it is necessary to test
only a single material in a representative fitting
to prove the design of the fitting. For yield-totensile ratios greater than 0.84, additional
testing should be considered.
(g) Location of rupture, if any, including a
sketch.
(f)
The test report shall be made available at the
manufacturer’s facility for inspection by the
purchaser or regulatory authority.
5. HYDROSTATIC TESTING
5.1 Unless otherwise agreed upon as per
Section 2.3, welding fittings shall be capable of
withstanding a hydrostatic test pressure as
specified in Section 2.2; however, hydrostatic
testing by the manufacturer is not required.
4.4.4 A test on a prototype elbow qualifies
elbows having longer radii than the test fitting
providing they qualify under Sections 4.4.1 and
4.4.3.
6. MATERIALS
6.1 The steel shall be fully “killed” and made
using recognized melting practices to provide
intended heat-treat response and notchtoughness properties. Steel shall be suitable for
field welding to other fittings, flanges, and pipe
manufactured to applicable specifications listed
in the ASME B31 Codes.
4.5 The manufacturer shall have a quality
control (QC) program that verifies the
manufacturing process used and ensures that the
resulting geometry of the fittings or joints
manufactured reasonably conforms to the
geometries tested. The QC program shall control
the manufacturing drawings and maintain the QC
records showing conformance to these drawings.
6.2 The material for fittings shall consist of
blooms, billets, slabs, forging quality bar, plate,
seamless or fusion-welded tubular products with
filler metal added.
Tests made in accordance with and at the time of
previous editions of this test are not intended to
be nullified by the changes made in this edition’s
test procedure and requirement.
6.3 The steel used shall be suitable weldingquality carbon steels or of a suitable weldingquality high-strength, low-alloy steel.
Whenever a significant change is made in the
geometry or method of manufacture, the
manufacturer shall either retest the new
production or show by analysis that the change
would not affect the results of prior tests.
6.4 If preheating of the material is required to
insure proper weldability under normal field
conditions, the manufacturer shall state specific
preheat requirements and permanently indicate
this on the fitting.
4.6 A report of the testing for each test
assembly shall be prepared and shall include:
(a) Description of the test, including the
number of tests and f factor used to
establish the target proof test;
(b) Instrumentation
and
calibrations used;
methods
7. CHEMICAL COMPOSITION
7.1 The determination of the chemical
composition of each heat of steel used in
meeting the requirements of Table 1 shall be
determined by a product analysis controlled by
the fitting manufacturer.
of
(c) Material test reports for the assembly’s
materials;
(d) Actual final pressures for each test;
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7.2 The choice and use of alloying elements for
fittings made from high-strength, low-alloy steels
to give the tensile properties that are prescribed in
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MSS
STANDARD PRACTICE
If the fittings will be exposed to an assembly
Post-Weld Heat Treatment (PWHT) or a field
PWHT and the PWHT temperature is higher
than the final tempering temperature for the
fitting, additional tensile testing shall be
requested by the purchaser to ensure the fitting
meets the requirements of Section 8 after the
PWHT thermal cycle.
Table 2 shall be made by the manufacturer, and
included and reported to identify the type of steel.
7.3 Carbon equivalent shall be computed by
one of the following equations:
1)
2)
For: C > 0.17%
CE  C 
Cr  Mo  V
Ni  Cu
Mn


6
5
15
8.3 Test specimens shall be in accordance with
ASTM A370 using full-size specimens or largest
sub-size specimens obtainable. Yield strength
shall be determined either by the 0.2% offset or
the 0.5% extension under load (EUL) method.
Test specimen orientation shall be taken
transverse to the major axis of the fitting using
NPS 8 or larger material and shall be longitudinal
to the major axis for smaller sizes. Test specimen
axial location shall be 1/2 t for thicknesses less
than or equal to 11⁄2 in., and 1/4 t for thicknesses
greater than 11⁄2 in.
For: C ≤ 0.17%
CE  C  F(
Mn Si Cu Ni Cr  MoV  Nb
 5B)
   
6
24 15 20
5
Where:
F is a compliance factor dependent upon
carbon content defined as follows:
Carbon
Carbon
Content,
Content,
F
F
%
%
0.75
<0.06
0.53
0.12
0.80
0.06
0.54
0.13
0.85
0.07
0.56
0.14
0.88
0.08
0.58
0.15
0.92
0.09
0.62
0.16
0.94
0.10
0.66
0.17
0.11
0.70
8.4 One base metal tension test to determine
yield strength, tensile strength, and percent (%)
elongation shall be made from each lot of
fittings. A lot shall consist of all fittings from the
same heat of material of the same starting wall
thickness, given the same heat treatment in a
furnace. The adequacy of the furnace working
zone to achieve and maintain temperature
uniformity within a range of 50 °F shall be
established by annual survey in accordance with
a recognized procedure such as ASTM
A991/A991M.
The maximum CE by either equation above shall
not exceed 0.45%. If the actual CE is greater than
0.42 %, the parts shall be stamped or paint marked
with the actual CE.
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8. TENSILE PROPERTIES
8.1 Tensile properties shall meet
requirements as specified in Table 2.
Alternatively, thermocouples may be attached to
a fitting in the lot or to a thermally equivalent
mass of material in contact with a fitting in the lot.
Thermocouples and other temperature measuring
recording devices shall be calibrated quarterly.
the
8.1.1 A fitting may have thickness or yield
strength or both unequal to the pipe with which
it is intended to be used, provided the weldingend preparation at the joint assures wall
thickness of the fitting is at least equal to the
specified pipe-wall thickness times the ratio of
the specified minimum yield strength of the
pipe and the minimum-tested yield strength of
the fitting. See Figures 3(a), 3(b), and 3(c) for
joint preparation.
8.5 Fittings containing welds shall have one
tension test specimen taken from across the weld
with the axis transverse to the weld seam for
each lot of fittings. Only the ultimate tensile
strength need meet the minimum requirements
of Table 2.
8.6 If the tension test specimen from any lot
fails to conform to the requirements for the
particular grade ordered, the manufacturer may
elect to make retests on two additional pieces
from the same lot, each of which shall conform
to the requirements specified in Table 2.
8.2 Test specimens shall be taken from the
fitting after final heat treatment or from a piece
of pipe or plate which has been heat treated in a
lot with any of the fitting(s) it represents (see
Section 8.4).
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MSS
STANDARD PRACTICE
If one or both of the retests fail to conform to the
requirements, the manufacturer may elect to test
each of the remaining pieces in the lot. Retests
are required only for the particular test with
which the specimen did not comply originally.
9.2 Heat Treat Procedures
Heat treat
procedures shall be available for review at the
facility and shall include requirements for
furnace temperatures and soak times at
temperature. For quench treatments, cooling
medium temperature before and after quench
shall be controlled along with time to the quench
tank. Cooling medium temperature and agitation
should be considered to ensure proper cooling
rate based on maximum mass being heat treated.
Furnaces shall be visually inspected regularly
for scale build-up, burner malfunction, loss of
refractory material, or hot spots on the shell of
the furnace.
8.7 It shall be permissible to cold flatten test
specimens.
9. HEAT TREATMENT
9.1 All fittings shall be furnished in a heat
treated condition done by a trained operator. Hot
formed fittings shall be cooled below the lower
critical temperature prior to heat treatment.
Fittings shall be heat treated by one or more of
the following procedures:
9.3 Heat Treat Records A record of each heat
treat load shall be recorded and reviewed for
consistency to previous loads of the same lot.
Records shall, at a minimum, include furnace
number, date, heat codes of all pieces in the load,
procedure used, order number and part
descriptions.
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9.1.1 Stress Relieving Stress relieving shall
be limited only to guide bar welds unless
otherwise agreed upon between the
manufacturer and the purchaser. Fittings shall
be heated to a suitable temperature below the
transformation range, but not less than 1000 ºF,
holding at temperature for not less than one
hour per inch of maximum thickness, but never
less than one-half hour and cooling in the
furnace or in air.
10. TRANSVERSE GUIDED-WELD
BEND-TESTS
10.1 Transverse guided-weld bend-tests shall
be performed only when specified on the order
(see Appendix X1 SR-2).
9.1.2 Normalizing Fittings shall be uniformly
reheated above the transformation range
(austenite range), held at this temperature a
sufficient time to achieve uniform temperature
throughout the mass and cooled in air.
10.2 Transverse-weld test specimens shall be
subjected to face and root-guided bend-tests.
The specimens shall be approximately 1.5 in.
wide, at least 6 in. long with the weld at the
center and shall be machined in accordance with
Figure 4. The face-bend specimen shall be bent
with the inside surface of the pipe against the
plunger and the root-bend specimen with the
outside surface against the plunger. The
dimensions of the plunger for the bending jig
shall be in accordance with Figure 5 and the
other dimensions shall be substantially as shown
in Figure 5.
9.1.3 Normalizing & Tempering Fittings
shall be normalized in accordance with Section
9.1.2. They shall then be tempered by reheating
to a temperature below the transformation
range, but not less than 1000 ºF, held at
temperature for a minimum of one hour per
inch of maximum thickness, but not less than
one-half hour and cooled in the furnace or in
air.
10.3 The bend tests shall be acceptable if no
cracks or other defects exceeding 0.12 in. in any
direction are present in the weld metal or
between the weld metal and the fitting metal
after the bending. Cracks that originate along the
edges of the specimen during testing and that are
less than 0.25 in. measured in any direction,
shall not be considered unless obvious defects
are observed.
9.1.4 Quenching & Tempering Fittings shall
be uniformly reheated above the transformation
range, held at temperature sufficient to achieve
uniform temperature throughout the mass and
immediately immersion quenched in a suitable
liquid medium. They shall then be reheated and
tempered per Section 9.1.3. Quenching
facilities shall be of sufficient size and
equipped to assure proper and uniform cooling.
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STANDARD PRACTICE
(including minimum wall thickness of 871⁄2%)
for NPS 14 and smaller sizes are contained in
ASME B16.9.
10.4 Two weld-bend test specimens, as
described in Section 10.2, shall be cut from a
specimen from each lot. The specimens may be
taken from a fitting or from sample plates as
described in Section 8.2.
13. TOLERANCES FOR WELDING
FITTINGS
10.5 If either test fails to conform to specified
requirements, the manufacturer may elect to
make retests on two additional specimens from
the same lot, each of which shall conform to the
requirements specified in Section 10.3. If any of
these specimens fail to conform to the
requirements, the manufacturer may elect to test
prolongations from each of the remaining
fittings in the lot.
13.1 Tolerances The tolerances for fittings
NPS 16 and larger are shown in Table 3 and are
applicable to the nominal dimensions given in
Tables 4 through 9 inclusive.
13.2 Wall Thickness The minimum wall
thickness may be 0.01 in. under the nominal
thickness, except that isolated non-continuous
reductions are permitted, provided the
remaining wall thickness is not diminished to
less than 93.5% of the specified nominal. This
tolerance does not apply to areas where the proof
test has indicated the need for reinforcement.
11. NOTCH-TOUGHNESS PROPERTIES
11.1 Notch-toughness properties shall be
determined with full size Charpy Type A-V
notch specimens in accordance with ASTM
A370 for base metal and weld. Sub-size
specimens shall be used only when material to
be tested is of insufficient thickness.
13.3 Welding
Ends
Unless
otherwise
specified, the details of the welding end
preparation shall be in accordance with Figures
1 and 2. The root face of the fitting shall be
machined flat and shall not vary from the plane
by more than 0.03 in. at any point. Where the
wall of the fitting exceeds that of matching pipe,
the transition shall be in accordance with the
details given in Figure 3.
11.2 Impact specimens shall be taken at the
same frequency, location and orientation as the
tensile tests (see Section 8.3). One set (three
specimens) of base metal and weld metal shall
be tested at +20 °F or lower and show 20 ft-lb
minimum average with no one specimen less
than 15 ft-lb. Percent shear shall be reported on
base metal only for informational purposes.
13.4 Angularity and Off Plane The ends of
fittings shall be cut in accordance with the
tolerances listed in Table 3.
11.3 Notch-toughness testing of NPS 14 and
smaller is not required unless grades WPHY 65
or higher are supplied or the purchaser specifies
testing.
13.5 Segmentable Elbows When elbows are
intended for segmenting in the field they shall be
furnished with a 1% maximum out-of-round
(OOR) based on the nominal mating pipe outside
diameter throughout the length of the elbow. The
inside diameter in all measured locations shall be
no larger than the mating pipe nominal inside
diameter to the high tolerance given in Table 3
based on circumferential readings. The outside or
inside diameter and out-of-round shall be
measured at both ends, the middle and at least
every 221⁄2 degrees of remaining elbow. Both ends
of the elbow shall be stamped or paint marked
“SEGM” to signify elbows are intended to be
segmented. The requirements stated above are
requisite on shop manufactured elbows before
segmenting. To minimize the difficulties of
elbow segmenting in the field, recommendations
in Appendix X3 should be considered.
11.4 If the acceptance requirements of Section
11.2 are not met, one retest of three additional
specimens from the same test location may be
performed. Each individual test value of the
retested specimens shall be equal to or greater
than the specified minimum average value.
12. FITTING DIMENSIONS
12.1 One of the principles of this Standard
Practice is the maintenance of a fixed position
for the welding ends with reference to the center
line of the fittings or the overall dimensions, as
the case may be. Dimensional standards for
fittings NPS 16 and larger are shown in Tables 3
through 9. Dimensional standards and tolerances
6
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--``,``,`,`,`,,``,````,`,`,`,``-`-`,,`,,`,`,,`---
MSS
MSS
STANDARD PRACTICE
14.4 Welding Fabrication
13.6 Minimum
Bore
Minimum
bore
throughout any fittings shall be at least 93% of
nominal pipe inside diameter, unless otherwise
agreed between purchaser and manufacturer.
14.4.1 Seam-welded pipe that is made in
accordance with an ASTM or API
Specification shall comply with the welding
requirements of the applicable material
specification. All other welds, including those
used in the manufacture of other pipe or
cylinders, shall be made by welders, welding
operators, and welding procedures qualified in
accordance with the provisions of Section IX
of the ASME Boiler and Pressure Vessel
Code.
14. MANUFACTURE
14.1 Fittings shall be manufactured in
accordance with a documented Manufacturing
Procedure Specification (MPS). If specified by
the purchaser, manufacturing shall not proceed
until the MPS has been accepted by the
purchaser.
The MPS shall specify the following items, as
applicable:
Qualified Welding Procedure Specifications
(WPS) and Procedure Qualification Records
(PQR) shall be available for review or
acceptance by the purchaser, if requested.
a) For the starting material:
1) Product form (seamless or welded) and
dimensions,
2) Welding NDE results, if not completed
by the fitting manufacturer;
b) For fitting manufacture:
1) Forming method,
2) Welding procedure specification and
approval record, if applicable,
3) Heat treatment procedure including
thermal cycles,
4) Machining requirements,
5) Inspection,
dimensions
and
test
requirements,
6) Proof test results if requested,
7) Traceability;
c) Additional requirements such as end
preparation, coating, and marking.
14.4.2 The joints shall be furnished in
accordance with the requirements of Paragraph
UW-35 (a) of Section VIII, Division 1 of the
ASME Boiler and Pressure Vessel Code.
14.4.3 Machine welding shall be done by an
electric process, preferably by submerged arc.
14.4.4 All butt welds shall have full
penetration. Submerged-arc machine welding
shall be done with at least one pass from the
inside, except when accessibility makes this
impossible, then, a manual or machine root
bead may be employed provided that a visual
inspection of the root bead is possible. Backing
rings shall not be used.
14.4.5 Repair, chipping or grinding of welds
shall be done in such a manner as not to gouge,
groove, or reduce the original metal thickness
by more than 61⁄2% of nominal specified wall.
14.2 Fittings may be made by forging,
hammering, pressing, piercing, rolling,
extruding, upsetting, welding, or by a
combination of these operations. The forming
procedure shall be so applied that it will not
produce injurious defects in the fittings.
14.4.6 Fillet welds shall have a full throat and,
unless otherwise specified, the legs shall be of
approximately equal length.
14.4.7 Welded-on braces, if used, should be
removed before heat treatment and the weld
spot shall be repaired and ground flush and
smooth. However, when braces are required for
heat treatment, they shall be cut out and the
surface shall be ground flush and smooth after
heat treatment. No welding shall be permitted
after heat treatment.
14.2.1 Fabricated tees, elbows, and other
fittings
employing
circumferential
or
intersection welds, e.g., miter welds, are
considered pipe fabrications, and are not within
the scope of this Standard Practice.
14.3 All outlets NPS 2 and larger shall be of
integral contour type and ends of outlets shall
match the joining pipe or fitting specified.
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MSS
STANDARD PRACTICE
14.4.8 Weld metal used in the construction of
fittings shall be suitable to meet the tensilestrength and notch toughness requirements of
Sections 8 and 11 when heat treated in
accordance with Section 9.
15.2 Magnetic Particle or Ultrasonic
Examination Magnetic particle or ultrasonic
examination shall be used for the examination of
all fillet welds and all other welds where it is
impossible or impractical to use radiographic
examination. Methods and acceptance standards
shall be by agreement between the manufacturer
and purchaser.
14.5 Workmanship and Finish
14.5.1 Fittings shall be free of injurious defects
and shall have workmanlike finish.
15.3 Magnetic Particle or Liquid Penetrant
Examination All butt-weld tees manufactured
by cold-forming method(s) shall be subjected to
magnetic particle or liquid penetrant
examination. This examination shall be
performed after final heat treatment. Only the
side wall area of the tees need be examined. This
area is defined by a circle that covers the area
from the weld bevel of the branch outlet to the
center line of the body or run. Internal and
external surfaces shall be examined, when size
permits accessibility. No cracks shall be
permitted. Other imperfections shall be treated
in accordance with Section 14.5. Acceptable
tees shall be marked with the symbol PT or MT,
as applicable, to indicate compliance.
Nondestructive examination personnel and
procedures shall be qualified in accordance with
ASME Boiler and Pressure Vessel Code,
Section V.
14.5.2 Injurious defects are defined as those
having a depth in excess of 61⁄2% of specified
nominal wall.
14.5.3 Machining and grinding of surface
defects shall be treated as follows: Sharp
defects such as notches, scratches, scabs,
seams, laps, tears, or slivers not deeper than
61⁄2% of nominal wall thickness shall be
removed by grinding. Repair of injurious
defects by welding shall be permitted, except
that welding of injurious defects shall not be
permitted when the depth of defect exceeds
331⁄3% of the nominal wall thickness, or the
length of repair exceeds 25% of the specified
diameter. Defects must be completely removed
and welding performed by a welder qualified
specifically for repair welding, as per Section
14.4.1. Such repair welding shall be ground
flush with the surface and all welding shall be
done before final heat treatment. Stress
relieving may be used as the final heat
treatment after repair welding provided the
fitting has previously undergone a heat
treatment in accordance with Section 9 and the
base material and welds meet the mechanical
properties of Sections 8 and 11 after the entire
thermal cycle. Repair welding shall be done
with low hydrogen electrodes, gas-metal-arc
process or submerged-arc process.
16. INSPECTION
16.1 Inspector At all times while work on the
contract of the purchaser is being performed, the
inspector representing the purchaser shall have
free entry to all parts of the manufacturer’s
facilities that involve the manufacture of the
ordered fittings. All reasonable access to
facilities shall be afforded to satisfy the
inspector that the product is being furnished in
accordance with these specifications. All tests
and inspections called for by these specifications
will be made in the manufacturer’s plant prior to
shipment and at the manufacturer’s expense
unless otherwise specified and shall be so
conducted as not to interfere unnecessarily with
the operations of the manufacturer’s plant.
15. NONDESTRUCTIVE EXAMINATION
(NDE)
15.1 Radiographic
Examination
Unless
otherwise agreed between purchaser and
manufacturer (see Appendix X1 SR-15), all butt
welds shall be radiographically examined in
accordance with Article 2 of ASME Boiler and
Pressure Vessel Code, Section V, using fine
grain film and lead screens. Longitudinal weld
seams shall meet the acceptance standards in
ASME Boiler and Pressure Vessel Code,
Section VIII, Division 1.
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16.2 Inspection Test Plan (ITP)
The
inspection and testing to be performed during
qualification and production shall be as
summarized in Section 16.2.1 below. When
requested, hold points by the purchaser should
be identified on a submitted ITP plan.
8
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MSS
STANDARD PRACTICE
f) SEGM(1) when appropriate, see Section 13.5
16.2.1 Inspection Test Plan Requirements
See Inspection Test Plan Requirements table on
page 10.
g) CE(1) if greater than 0.42%
h) “Part” for partial compliance fitting if
applicable, see Section 1.4.1
16.3 Certified Material Test Report (CMTR)
A Certified Material Test Report shall be
furnished listing the actual results of the
chemical product analysis , including carbon
equivalent, Section 7; mechanical properties of
each lot of steel and tensile strength of weld (if
applicable), Section 8; notch-toughness
properties of all specimens, Section 11; heat
treatment used including temperatures, Section
9; nondestructive examination reports as
applicable, Section 15; and any special or
supplemental tests required by the purchase
order. The CMTR shall include a part
description that matches the marking on the part.
Any applicable customer specification may be
listed on the CMTR. Unless otherwise specified,
the latest edition of SP-75 shall apply and be
indicated on the CMTR.
i) Preheat conditions if applicable, see
Section 6.4
j) PT or MT as applicable, see Section 15.3
Any deviation from these mandatory
requirements will need agreement between
manufacturer and purchaser.
17.2 In addition to the above, extruded headers
shall also include the following information:
a) Design pressure
b) Temperature
c) Per ASME B31.8
16.4 Rejection Each fitting in which
injurious defects are found during shop or
field fabrication may be rejected, and the
manufacturer shall be notified.
NOTE: (1) At the option of the manufacturer, this
information may be paint stenciled in lieu of die
stamping.
17. MARKING
17.1 All fittings furnished under this Standard
Practice shall be clearly defined on the outside
diameter with the following information marked
using low-stress die stamps or interrupted-dot
stamps, except as noted:
SUPPLEMENTAL INFORMATION:
Appendix X1 (Supplementary Requirements), X2
(Longitudinal-Bead Underbead Cracking Test),
and X3 (Recommendations for Segmenting) are
“supplemental information” and located after the
normative text (including Tables and Annex A),
starting on page 26.
a) Manufacturer’s name or trademark
b) Nominal wall thickness of fittings at bevel
ends
Note that in the case of unequal thickness, as
in Section 8.1.1, the actual wall thickness of
the fitting at the bevel ends shall be identified.
c) Respective grade as given in Table 2
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Note that in the case of unequal yield
strength, as in Section 8.1.1, both the
minimum-tested yield strength of the fitting
and the specified minimum yield strength of
the pipe shall be identified, for example;
WPHY60/X70
Also note that the designation “WPHY”
represents marking for fittings, “X”
represents marking for mating pipe grade.
d) Heat code identity
e) Size(1)
9
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MSS
STANDARD PRACTICE
SP-75
INSPECTION TEST PLAN REQUIREMENTS
(From Section 16.2.1)
Type of Test
Mandatory Requirements:
Chemical Analysis – base metal
Tensile – base metal
Tensile – weld
Impact Testing – base metal & weld
Visual Inspection
RT/UT – weld seam
MP/LP – cold formed tees
Dimensional Checks
Type of Test
If specified by purchaser:
Chemical Analysis – weld metal combination
Impacts – weld seam HAZ
Hardness Test – base/weld metal
Underbead Crack Test
Guided-Bend Test – weld
MP/UT – welds
MP/LP End Bevels
UT Fitting Body
Sour Gas Applications
No Repair Weld
No Wall Substitution
Section, Appendix XI SR
Number of Tests
7.1
8.4
8.5
11.2
14.5
15.1, SR-15
15.3
12 & Tables 3 to 9
1 per heat
1 per lot
1 per lot
2 sets of 3
Each fitting
100% of all welds
Each tee
Per MPS
Section, Appendix XI SR
Number of Tests
SR-13
SR-17
SR-22
SR-1
10.2, SR-2
15.2
SR-14
SR-8
SR-4
SR-11
8.1.1, SR-18
Each filler metal/flux
By agreement
1 per lot or each fitting
Per heat
2 per lot
Only if RT not practical
Each end or by agreement
Each fitting or by agreement
Per Customer PO
By agreement
By agreement
10
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MSS
STANDARD PRACTICE
NOTES:
(1) Or 1 in. at the option of the manufacturer.
(2) Fittings NPS 24 and smaller may be furnished with 37½° + 2½° bevel, at
the option of the manufacturer.
FIGURE 1
RECOMMENDED BEVEL FOR WALL THICKNESSES (T)
AT END OF FITTING, 0.75 IN.(1) OR LESS
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FIGURE 2
RECOMMENDED BEVEL FOR WALL THICKNESSES (T)
AT END OF FITTING, GREATER THAN 0.75 IN.
11
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SP-75
MSS
STANDARD PRACTICE
SP-75
NOTE: When the minimum-specified yield strengths of the sections to be joined are unequal, the
deposited weld metal shall have mechanical properties at least equal to those of the section having
the higher strength, and the tf shall at least equal t times the ratio of minimum-specified yield strength
of pipe and fitting.
FIGURE 3
ACCEPTABLE DESIGN FOR UNEQUAL WALL THICKNESS (See Section 8.1.1)
Pipe Wall Thickness (t)
Test Specimen Thickness (T) (in.)
Up to 0.375 in. incl. . . . .
t
Over 0.375 in. . . . . . . . .
0.375 in.
FIGURE 4
TRANSVERSE FACE AND ROOT-BEND TEST SPECIMENS
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MSS
STANDARD PRACTICE
SP-75
Guided-Bend Test Jig Dimensions
WPHY Grade of Steel
Radius of male member, R A . . . . .
Radius of female member, R B . . . .
Width of male member, A . . . . . . .
Width of groove in female member, B . .
42
46
52, 56
60, 65, 70, 80
3T
4T + .06 in.
6T
8T + 0.12 in.
1
4T
5T + .06 in.
8T
10T + 0.12 in.
41 ⁄2 T
5 ⁄2 T + 0.06 in.
9T
11T + 0.12 in.
3 ⁄2 T
4 ⁄2 T + 0.06 in.
7T
9T + 0.12 in.
1
1
T = Specimen Wall Thickness
FIGURE 5
GUIDED-BEND TEST JIG
13
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MSS
STANDARD PRACTICE
SP-75
TABLE 1
Maximum Limit of Chemical Elements
(% Max.)
Carbon (C)
Manganese (Mn)
Phosphorus (P)
Sulphur (S)
Copper (Cu)
{NOTE (1)}
Nickel (Ni)
{NOTE (1)}
Silicon (Si)
Chromium (Cr)
{NOTE (1)}
Molybdenum (Mo) {NOTE (1)}
Vanadium (V)
Niobium (Columbium) (Nb)
Titanium (Ti)
Boron (B)
0.30
1.60
0.035
0.035
0.50
0.50
0.50
0.25
0.25
0.13
0.10
0.05
0.001
NOTE: (1) The sum of copper, nickel, chromium, and molybdenum
shall not exceed 1%.
GENERAL NOTE: Alternate alloy elements may be used but they
shall be discussed with the purchaser prior to delivery of the material.
This table is not intended to represent the composition of any heat of
steel, but merely to record the maximum permissible amounts of an
element. The combination of elements of any heat must conform to
carbon equivalent, Section 7.3.
TABLE 2
Tensile Requirements
Minimum
Grade
Elongation
All Thicknesses
(%, in 2 in.)
WPHY-42
42,000
60,000
25
WPHY-46
46,000
63,000
25
WPHY-52
52,000
66,000
25
WPHY-56
56,000
71,000
20
WPHY-60
60,000
75,000
20
WPHY-65
65,000
77,000
20
WPHY-70
70,000
82,000
18
WPHY-80
80,000
90,000
16
NOTE: The tensile requirements for intermediate grades shall be obtained by linear interpolation
between those specified for standard grades. The minimum elongation value shall be as given in
the Table for next higher standard grade.
Yield Strength
Min. psi
Tensile Strength, Min. psi
14
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Element
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Nominal
(-0.01)
Minimum(3)
Wall
Thickness
(5)
(5)
(5)
0.19
Elbows(5)
0.19
0.12
0.12
0.12
Other
At Ends of
Fittings
2.5%
2.5%
2.5%
2.5%
Throughout(4)
Body of
Elbows
± 0.25
± 0.19
± 0.12
± 0.09
1 1 /2 R
& Tee
± 0.38
± 0.38
± 0.25
± 0.12
3R
90º, 60º, 45º & 30º
Elbows & Tees
Center-to-End
Dimension
A, B, C, M
± 0.38
± 0.38
± 0.19
± 0.09
Reducers
Overall
Length
H
± 0.38
± 0.38
± 0.38
± 0.25
Caps
Overall
Length
E
0.19
0.12
0.09
0.09
Angularity
Off
Angle
Q
0.75
0.75
0.50
0.25
2.5%
2.5%
2.5%
2.5%
Eccentric
and
Elbows Concentric
Off
Reducers
Plane
Off Plane
P
P(6)
Dimensions are in inches
STANDARD PRACTICE
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--``,``,`,`,`,,``,````,`,`,`,``-`-`,,`,,`,`,,`---
GENERAL NOTE: The O.D. may be tapered at an angle up to 30º beyond weld bevel.
NOTES:
(1) The inside diameter at end shall be determined by circumferential measurements, and the tolerance
refers to variations from nominal I.D. calculation by (O.D. nom. – 2tnom.).
(2) Out-of-roundness tolerances shall be the difference between the maximum and minimum
diameters measured on any radial cross-section.
(3) Minus 0.01 in. except that isolated non-continuous reductions are permitted in accordance with
Section 13.2. Excess thickness whether on inside or outside is to be treated in accordance
with sketches given in Figure 3.
(4) When elbows are intended for segmenting, see Section 13.5
(5) Out-of-roundness tolerances at ends shall he 1% of mating pipe outside diameter for NPS 26 and larger.
(6) Percent (%) of nominal O.D.
± 0.25
26 – 36
50 – 60
± 0.09
16 – 24
± 0.12
± 0.09
NPS
38 – 48
Inside(1)
Diameter
at End
Out-of-Roundness(2)
TABLE 3
Tolerances
MSS
SP-75
MSS
STANDARD PRACTICE
SP-75
TABLE 4
Dimensions of Long-Radius Elbows
Dimensions are in inches
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Center-to-End
90° Elbows
45° Elbows
A
B
24.00
10.00
27.00
11.25
30.00
12.50
33.00
13.50
36.00
15.00
NPS
Outside Diameter
at Bevel
16
18
20
22
24
16.00
18.00
20.00
22.00
24.00
26
28
30
32
34
36
26.00
28.00
30.00
32.00
34.00
36.00
39.00
42.00
45.00
48.00
51.00
54.00
16.00
17.25
18.50
19.75
21.00
22.25
38
40
42
44
46
48
38.00
40.00
42.00
44.00
46.00
48.00
57.00
60.00
63.00
66.00
69.00
72.00
23.62
24.88
26.00
27.38
28.62
29.88
50
52
54
56
58
60
50.00
52.00
54.00
56.00
58.00
60.00
75.00
78.00
81.00
84.00
87.00
90.00
31.00
32.25
33.50
34.75
36.00
37.25
16
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STANDARD PRACTICE
SP-75
TABLE 5
Dimensions of 3R Elbows
Dimensions are in inches
90º
Elbows
Center-to-End
60º
45º
Elbows
Elbows
30º
Elbows
16.00
18.00
20.00
22.00
24.00
48.00
54.00
60.00
66.00
72.00
27.69
31.18
34.62
38.12
41.62
19.88
22.38
24.88
27.31
29.81
12.88
14.44
16.06
17.69
19.31
26
28
30
32
34
36
26.00
28.00
30.00
32.00
34.00
36.00
78.00
84.00
90.00
96.00
102.00
108.00
45.00
48.50
52.00
55.44
58.94
62.44
32.31
34.75
37.25
39.75
42.25
44.69
20.88
22.50
24.06
25.75
27.38
28.94
38
40
42
44
46
48
38.00
40.00
42.00
44.00
46.00
48.00
114.00
120.00
126.00
132.00
138.00
144.00
65.88
69.25
72.75
76.25
79.69
83.19
47.25
49.75
52.19
54.69
57.19
59.69
30.56
32.19
33.75
35.38
37.00
38.62
50
52
54
56
58
60
50.00
52.00
54.00
56.00
58.00
60.00
150.00
156.00
162.00
168.00
174.00
180.00
86.62
90.06
93.50
97.00
100.44
103.94
62.12
64.62
67.12
69.56
72.06
74.56
40.19
41.81
43.44
45.00
46.62
48.25
NPS
O.D.
at
Bevel
16
18
20
22
24
--``,``,`,`,`,,``,````,`,`,`,``-`-`,,`,,`,`,,`---
17
Provided by IHS
No reproduction or networking permitted without license from IHS
Licensee=Servicios Maritimos de Campeche, S.A, de C.V/5970345002, User=DE CAMPEC
Not for Resale, 11/20/2014 09:30:52 MST
MSS
STANDARD PRACTICE
SP-75
TABLE 6
Dimensions of Straight Tees
Dimensions are in inches
NPS
Outside
Diameter
at Bevel
Run-C
Outlet-M(1)
16
18
20
22
24
16.00
18.00
20.00
22.00
24.00
12.00
13.50
15.00
16.50
17.00
12.00
13.50
15.00
16.50
17.00
26
28
30
32
34
36
26.00
28.00
30.00
32.00
34.00
36.00
19.50
20.50
22.00
23.50
25.00
26.50
19.50
20.50
22.00
23.50
25.00
26.50
38
40
42
44
46
48
38.00
40.00
42.00
44.00
46.00
48.00
28.00
29.50
30.00
32.00
33.50
35.00
28.00
29.50
28.00
30.00
31.50
33.00
50
52
54
56
58
60
50.00
52.00
54.00
56.00
58.00
60.00
36.75
38.50
40.00
41.50
43.00
44.00
34.50
35.75
37.25
38.50
40.00
41.50
NOTE: (1) Outlet Dimension “M” is recommended but not mandatory
(consult fitting manufacturer).
18
Provided by IHS
No reproduction or networking permitted without license from IHS
Licensee=Servicios Maritimos de Campeche, S.A, de C.V/5970345002, User=DE CAMPEC
Not for Resale, 11/20/2014 09:30:52 MST
--``,``,`,`,`,,``,````,`,`,`,``-`-`,,`,,`,`,,`---
Center-to-End
MSS
STANDARD PRACTICE
SP-75
TABLE 7
Dimensions of Reducing Outlet Tees
Dimensions are in inches
Dimensions are in inches
NPS
Outside
Diameter
at Bevel
Center-to-End
NPS
Run-C
Outlet-M(1)
Run
Outlet
1616l4
1616l2
161610
16168
16166
16.00
16.00
16.00
16.00
16.00
14.00
12.75
10.75
8.62
6.62
12.00
12.00
12.00
12.00
12.00
12.00
11.62
11.12
10.75
10.38
l8l816
l818l4
l8l8l2
l8l8l0
18l88
18.00
18.00
18.00
18.00
18.00
16.00
14.00
12.75
10.75
8.62
13.50
13.50
13.50
13.50
13.50
13.00
13.00
12.62
12.12
11.75
2020l8
2020l6
2020l4
2020l2
2020l0
20208
20.00
20.00
20.00
20.00
20.00
20.00
18.00
16.00
14.00
12.75
10.75
8.62
15.00
15.00
15.00
15.00
15.00
15.00
14.50
14.00
14.00
13.62
13.12
12.75
222220
222218
222216
222214
222212
222210
22.00
22.00
22.00
22.00
22.00
22.00
20.00
18.00
16.00
14.00
12.75
10.75
16.50
16.50
16.50
16.50
16.50
16.50
16.00
15.50
15.00
15.00
14.62
14.12
242422
242420
242418
242416
242414
242412
242410
24.00
24.00
24.00
24.00
24.00
24,00
24.00
22.00
20.00
18.00
16.00
14.00
12.75
10.75
17.00
17.00
17.00
17.00
17.00
17.00
17.00
17.00
17.00
16.50
16.00
16.00
15.62
15.12
Outside
Diameter
At Bevel
Center-to-End
Run-C
Outlet-M(1)
Run
Outlet
262624
262622
262620
262618
262616
262614
2626l2
26.00
26.00
26.00
26.00
26.00
26.00
26.00
24.00
22.00
20.00
18.00
16.00
14.00
12.75
19.50
19.50
19.50
19.50
19.50
19.50
19.50
19.00
18.50
18.00
17.50
17.00
17.00
16.62
282826
282824
28x28x22
28x28x20
282818
282816
282814
282812
28.00
28.00
28.00
28.00
28.00
28.00
28.00
28.00
26.00
24.00
22.00
20.00
18.00
16.00
14.00
12.75
20.50
20.50
20.50
20.50
20.50
20.50
20.50
20.50
20.50
20.00
19.50
19.00
18.50
18.00
18.00
17.62
303028
30x30x26
303024
303022
303020
303018
303016
303014
303012
303010
30.00
30.00
30.00
30.00
30.00
30.00
30.00
30.00
30.00
30.00
28.00
26.00
24.00
22.00
20.00
18.00
16.00
14.00
12.75
10.75
22.00
22.00
22.00
22.00
22.00
22.00
22.00
22.00
22.00
22.00
21.50
21.50
21.00
20.50
20.00
19.50
19.00
19.00
18.62
18.12
32x32x30
32x32x28
32x32x26
32x32x24
32x32x22
32x32x20
32x32x18
32x32x16
32x32x14
32.00
32.00
32.00
32.00
32.00
32.00
32.00
32.00
32.00
30.00
28.00
26.00
24.00
22.00
20.00
18.00
16.00
14.00
23.50
23.50
23.50
23.50
23.50
23.50
23.50
23.50
23.50
23.00
22.50
22.50
22.00
21.50
21.00
20.50
20.00
20.00
NOTE: (1) Outlet Dimension “M” is recommended but not
mandatory (consult fitting manufacturer)
NOTE: (1) Outlet Dimension “M” is recommended but not
mandatory (consult fitting manufacturer)
--``,``,`,`,`,,``,````,`,`,`,``-`-`,,`,,`,`,,`---
19
Provided by IHS
No reproduction or networking permitted without license from IHS
Licensee=Servicios Maritimos de Campeche, S.A, de C.V/5970345002, User=DE CAMPEC
Not for Resale, 11/20/2014 09:30:52 MST
MSS
STANDARD PRACTICE
SP-75
TABLE 7 (Continued)
Dimensions of Reducing Outlet Tees
Dimensions are in inches
NPS
Outside
Diameter
at Bevel
Dimensions are in inches
Center-to-End
Run-C
Outlet-M(1)
--``,``,`,`,`,,``,````,`,`,`,``-`-`,,`,,`,`,,`---
Run
Outlet
34 x 34 x 32
34 x 34 x 30
34 x 34 x 28
34 x 34 x 26
34 x 34 x 24
34 x 34 x 22
34 x 34 x 20
34 x 34 x 18
34 x 34 x 16
34.00
34.00
34.00
34.00
34.00
34.00
34.00
34.00
34.00
32.00
30.00
28.00
26.00
24.00
22.00
20.00
18.00
16.00
25.00
25.00
25.00
25.00
25.00
25.00
25.00
25.00
25.00
24.50
24.00
23.50
23.50
23.00
22.50
22.00
21.50
21.00
36 x 36 x 34
36 x 36 x 32
36 x 36 x 30
36 x 36 x 28
36 x 36 x 26
36 x 36 x 24
36 x 36 x 22
36 x 36 x 20
36 x 36 x 18
36 x 36 x 16
36.00
36.00
36.00
36.00
36.00
36.00
36.00
36.00
36.00
36.00
34.00
32.00
30.00
28.00
26.00
24.00
22.00
20.00
18.00
16.00
26.50
26.50
26.50
26.50
26.50
26.50
26.50
26.50
26.50
26.50
26.00
25.50
25.00
24.50
24.50
24.00
23.50
23.00
22.50
22.00
38 x 38 x 36
38 x 38 x 34
38 x 38 x 32
38 x 38 x 30
38 x 38 x 28
38 x 38 x 26
38 x 38 x 24
38 x 38 x 22
38 x 38 x 20
38 x 38 x 18
38.00
38.00
38.00
38.00
38.00
38.00
38.00
38.00
38.00
38.00
36.00
34.00
32.00
30.00
28.00
26.00
24.00
22.00
20.00
18.00
28.00
28.00
28.00
28.00
28.00
28.00
28.00
28.00
28.00
28.00
28.00
27.50
27.00
26.50
25.50
25.50
25.00
24.50
24.00
23.50
40 x 40 x 38
40 x 40 x 36
40 x 40 x 34
40 x 40 x 32
40 x 40 x 30
40 x 40 x 28
40 x 40 x 26
40 x 40 x 24
40 x 40 x 22
40 x 40 x 20
40 x 40 x 18
40.00
40.00
40.00
40.00
40.00
40.00
40.00
40.00
40.00
40.00
40.00
38.00
36.00
34.00
32.00
30.00
28.00
26.00
24.00
22.00
20.00
18.00
29.50
29.50
29.50
29.50
29.50
29.50
29.50
29.50
29.50
29.50
29.50
29.50
29.00
28.50
28.00
27.50
26.50
26.50
26.00
25.50
25.00
24.50
42 x 42 x 36
42 x 42 x 34
42 x 42 x 32
42 x 42 x 30
42 x 42 x 28
42 x 42 x 26
42.00
42.00
42.00
42.00
42.00
42.00
36.00
34.00
32.00
30.00
28.00
26.00
30.00
30.00
30.00
30.00
30.00
30.00
28.00
28.00
28.00
28.00
27.50
27.50
NPS
NOTE: (1) Outlet dimension “M” is recommended but not
mandatory (consult fitting manufacturer).
Outside
Diameter
at Bevel
Center-to-End
Run-C
Outlet-M(1)
Run
Outlet
42 x 42 x 24
42 x 42 x 22
42 x 42 x 20
42 x 42 x 18
42 x 42 x 16
42.00
42.00
42.00
42.00
42.00
24.00
22.00
20.00
18.00
16.00
30.00
30.00
30.00
30.00
30.00
26.00
26.00
26.00
25.50
25.00
44 x 44 x 42
44 x 44 x 40
44 x 44 x 38
44 x 44 x 36
44 x 44 x 34
44 x 44 x 32
44 x 44 x 30
44 x 44 x 28
44 x 44 x 26
44 x 44 x 24
44 x 44 x 22
44 x 44 x 20
44.00
44.00
44.00
44.00
44.00
44.00
44.00
44.00
44.00
44.00
44.00
44.00
42.00
40.00
38.00
36.00
34.00
32.00
30.00
28.00
26.00
24.00
22.00
20.00
32.00
32.00
32.00
32.00
32.00
32.00
32.00
32.00
32.00
32.00
32.00
32.00
30.00
29.50
29.00
28.50
28.50
28.00
28.00
27.50
27.50
27.50
27.00
27.00
46 x 46 x 44
46 x 46 x 42
46 x 46 x 40
46 x 46 x 38
46 x 46 x 36
46 x 46 x 34
46 x 46 x 32
46 x 46 x 30
46 x 46 x 28
46 x 46 x 26
46 x 46 x 24
46 x 46 x 22
46.00
46.00
46.00
46.00
46.00
46.00
46.00
46.00
46.00
46.00
46.00
46.00
44.00
42.00
40.00
38.00
36.00
34.00
32.00
30.00
28.00
26.00
24.00
22.00
33.50
33.50
33.50
33.50
33.50
33.50
33.50
33.50
33.50
33.50
33.50
33.50
31.50
31.00
30.50
30.00
30.00
29.50
29.50
29.00
29.00
29.00
28.50
28.50
48 x 48 x 46
48 x 48 x 44
48 x 48 x 42
48 x 48 x 40
48 x 48 x 38
48 x 48 x 36
48 x 48 x 34
48 x 48 x 32
48 x 48 x 30
48 x 48 x 28
48 x 48 x 26
48 x 48 x 24
48 x 48 x 22
48 x 48 x 20
48 x 48 x 18
48 x 48 x 16
48.00
48.00
48.00
48.00
48.00
48.00
48.00
48.00
48.00
48.00
48.00
48.00
48.00
48.00
48.00
48.00
46.00
44.00
42.00
40.00
38.00
36.00
34.00
32.00
30.00
28.00
26.00
24.00
22.00
20.00
18.00
16.00
35.00
35.00
35.00
35.00
35.00
35.00
35.00
35.00
35.00
35.00
35.00
35.00
35.00
35.00
35.00
35.00
33.00
33.00
32.00
32.00
32.00
31.00
31.00
31.00
30.00
30.00
30.00
29.00
29.00
29.00
28.50
28.00
NOTE: (1) Outlet dimension “M” is recommended but not
mandatory (consult fitting manufacturer).
20
Provided by IHS
No reproduction or networking permitted without license from IHS
Licensee=Servicios Maritimos de Campeche, S.A, de C.V/5970345002, User=DE CAMPEC
Not for Resale, 11/20/2014 09:30:52 MST
MSS
STANDARD PRACTICE
SP-75
TABLE 7 (Continued)
Dimensions of Reducing Outlet Tees
Dimensions are in inches
NPS
Outside Diameter
at Bevel
Center-to-End
Run-C
Outlet-M(1)
Run
Outlet
50 x 50 x 48
50 x 50 x 42
50 x 50 x 36
50 x 50 x 30
50 x 50 x 24
50 x 50 x 20
50.00
50.00
50.00
50.00
50.00
50.00
48.00
42.00
36.00
30.00
24.00
20.00
36.75
36.75
36.75
36.75
36.75
36.75
34.50
33.00
32.50
31.50
30.00
30.00
52 x 52 x 50
52 x 52 x 48
52 x 52 x 42
52 x 52 x 36
52 x 52 x 30
52 x 52 x 24
52.00
52.00
52.00
52.00
52.00
52.00
50.00
48.00
42.00
36.00
30.00
24.00
38.50
38.50
38.50
38.50
38.50
38.50
35.75
35.75
34.50
34.00
32.75
31.25
54 x 54 x 52
54 x 54 x 48
54 x 54 x 42
54 x 54 x 36
54 x 54 x 30
54 x 54 x 24
54.00
54.00
54.00
54.00
54.00
54.00
52.00
48.00
42.00
36.00
30.00
24.00
40.00
40.00
40.00
40.00
40.00
40.00
37.25
37.25
35.63
35.00
34.00
31.38
56 x 56 x 54
56 x 56 x 48
56 x 56 x 42
56 x 56 x 36
56 x 56 x 30
56 x 56 x 24
56.00
56.00
56.00
56.00
56.00
56.00
54.00
48.00
42.00
36.00
30.00
24.00
41.50
41.50
41.50
41.50
41.50
41.50
38.50
37.00
36.50
35.50
33.75
33.75
58 x 58 x 56
58 x 58 x 54
58 x 58 x 48
58 x 58 x 42
58 x 58 x 36
58 x 58 x 30
58.00
58.00
58.00
58.00
58.00
58.00
56.00
54.00
48.00
42.00
36.00
30.00
43.00
43.00
43.00
43.00
43.00
43.00
40.00
40.00
38.50
37.50
36.50
35.00
60 x 60 x 58
60 x 60 x 54
60 x 60 x 48
60 x 60 x 42
60 x 60 x 36
60 x 60 x 30
60.00
60.00
60.00
60.00
60.00
60.00
58.00
54.00
48.00
42.00
36.00
30.00
44.00
44.00
44.00
44.00
44.00
44.00
41.50
40.50
40.00
39.00
38.00
36.00
NOTE: (1) Outlet dimension “M” is recommended but not mandatory (consult fitting
manufacturer).
21
Provided by IHS
No reproduction or networking permitted without license from IHS
--``,``,`,`,`,,``,````,`,`,`,``-`-`,,`,,`,`,,`---
Licensee=Servicios Maritimos de Campeche, S.A, de C.V/5970345002, User=DE CAMPEC
Not for Resale, 11/20/2014 09:30:52 MST
MSS
STANDARD PRACTICE
SP-75
TABLE 8
Dimensions of Caps (1)
Dimensions are in inches
--``,``,`,`,`,,``,````,`,`,`,``-`-`,,`,,`,`,,`---
NPS
Outside
Diameter
at Bevel
E
16
18
20
22
24
16.00
18.00
20.00
22.00
24.00
7.00
8.00
9.00
10.00
10.50
8.00
9.00
10.00
11.00
12.00
26
28
30
32
34
36
26.00
28.00
30.00
32.00
34.00
36.00
10.50
10.50
10.50
10.50
10.50
10.50
12.00
12.00
12.00
12.00
12.00
12.00
38
40
42
44
46
48
38.00
40.00
42.00
44.00
46.00
48.00
12.00
12.00
12.00
13.50
13.50
13.50
13.50
13.50
13.50
15.00
15.00
15.00
50
52
54
56
58
60
50.00
52.00
54.00
56.00
58.00
60.00
14.50
14.50
16.00
16.00
16.50
16.50
16.00
16.00
17.50
17.50
18.00
18.00
End-to-End
E1 (2)
NOTES:
(1) The shape of these caps shall be ellipsoidal and shall conform to the shape
requirements as given in the ASME Boiler and Pressure Vessel Code.
(2) For t greater than 1.0 inch, caps may be furnished to length “E1”, at
option of manufacturer.
22
Provided by IHS
No reproduction or networking permitted without license from IHS
Licensee=Servicios Maritimos de Campeche, S.A, de C.V/5970345002, User=DE CAMPEC
Not for Resale, 11/20/2014 09:30:52 MST
MSS
STANDARD PRACTICE
TABLE 9
Dimensions of Reducers
Dimensions are in inches
NPS
Dimensions are in inches
NPS
Outside Diameter
at Bevel
SP-75
End-to-End
--``,``,`,`,`,,``,````,`,`,`,``-`-`,,`,,`,`,,`---
Large End
Small End
Length H
16 x 14
16 x 12
16 x 10
16 x 8
16.00
16.00
16.00
16.00
14.00
12.75
10.75
8.62
14.00
14.00
14.00
14.00
18 x 16
18 x 14
18 x 12
18 x 10
18.00
18.00
18.00
18.00
16.00
14.00
12.75
10.75
15.00
15.00
15.00
15.00
20 x 18
20 x 16
20 x 14
20 x 12
20.00
20.00
20.00
20.00
18.00
16.00
14.00
12.75
20.00
20.00
20.00
20.00
22 x 20
22 x 18
22 x 16
22 x 14
22.00
22.00
22.00
22.00
20.00
18.00
16.00
14.00
20.00
20.00
20.00
20.00
24 x 22
24 x 20
24 x 18
24 x 16
24.00
24.00
24.00
24.00
22.00
20.00
18.00
16.00
20.00
20.00
20.00
20.00
26 x 24
26 x 22
26 x 20
26 x 18
26.00
26.00
26.00
26.00
24.00
22.00
20.00
18.00
24.00
24.00
24.00
24.00
28 x 26
28 x 24
28 x 22
28 x 20
28 x 18
28.00
28.00
28.00
28.00
28.00
26.00
24.00
22.00
20.00
18.00
24.00
24.00
24.00
24.00
24.00
30 x 28
30 x 26
30 x 24
30 x 22
30 x 20
30.00
30.00
30.00
30.00
30.00
28.00
26.00
24.00
22.00
20.00
24.00
24.00
24.00
24.00
24.00
32 x 30
32 x 28
32 x 26
32 x 24
32.00
32.00
32.00
32.00
30.00
28.00
26.00
24.00
24.00
24.00
24.00
24.00
34 x 32
34 x 30
34 x 28
34 x 26
34 x 24
34.00
34.00
34.00
34.00
34.00
32.00
30.00
28.00
26.00
24.00
24.00
24.00
24.00
24.00
24.00
36 x 34
36 x 32
36 x 30
36 x 28
36 x 26
36 x 24
36.00
36.00
36.00
36.00
36.00
36.00
34.00
32.00
30.00
28.00
26.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
Outside Diameter
at Bevel
End-to-End
Large End
Small End
Length H
38 x 36
38 x 34
38 x 32
38 x 30
38 x 28
38 x 26
38 x 24
38 x 22
38 x 20
38.00
38.00
38.00
38.00
38.00
38.00
38.00
38.00
38.00
36.00
34.00
32.00
30.00
28.00
26.00
24.00
22.00
20.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
40 x 38
40 x 36
40 x 34
40 x 32
40 x 30
40 x 28
40 x 26
40 x 24
40 x 22
40 x 20
40.00
40.00
40.00
40.00
40.00
40.00
40.00
40.00
40.00
40.00
38.00
36.00
34.00
32.00
30.00
28.00
26.00
24.00
22.00
20.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
42 x 40
42 x 38
42 x 36
42 x 34
42 x 32
42 x 30
42 x 28
42 x 26
42 x 24
42 x 22
42.00
42.00
42.00
42.00
42.00
42.00
42.00
42.00
42.00
42.00
40.00
38.00
36.00
34.00
32.00
30.00
28.00
26.00
24.00
22.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
44 x 42
44 x 40
44 x 38
44 x 36
44 x 34
44 x 32
44 x 30
44 x 28
44 x 26
44 x 24
44 x 22
44.00
44.00
44.00
44.00
44.00
44.00
44.00
44.00
44.00
44.00
44.00
42.00
40.00
38.00
36.00
34.00
32.00
30.00
28.00
26.00
24.00
22.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
24.00
46 x 44
46 x 42
46 x 40
46 x 38
46 x 36
46 x 34
46 x 32
46 x 30
46 x 28
46 x 26
46 x 24
46.00
46.00
46.00
46.00
46.00
46.00
46.00
46.00
46.00
46.00
46.00
44.00
42.00
40.00
38.00
36.00
34.00
32.00
30.00
28.00
26.00
24.00
28.00
28.00
28.00
28.00
28.00
28.00
28.00
28.00
28.00
28.00
28.00
48 x 46
48 x 44
48 x 42
48 x 40
48 x 38
48 x 36
48 x 34
48 x 32
48 x 30
48 x 28
48 x 26
48 x 24
48.00
48.00
48.00
48.00
48.00
48.00
48.00
48.00
48.00
48.00
48.00
48.00
46.00
44.00
42.00
40.00
38.00
36.00
34.00
32.00
30.00
28.00
26.00
24.00
28.00
28.00
28.00
28.00
28.00
28.00
28.00
28.00
28.00
28.00
28.00
28.00
23
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MSS
STANDARD PRACTICE
TABLE 9 (Continued)
Dimensions of Reducers
Dimensions are in inches
NPS
Outside Diameter
at Bevel
Large
Small End
End
50 x 48
50 x 42
50 x 36
50 x 30
50 x 24
50 x 20
50.00
50.00
50.00
50.00
50.00
50.00
48.00
42.00
36.00
30.00
24.00
20.00
28.00
28.00
28.00
28.00
28.00
28.00
52 x 50
52 x 48
52 x 42
52 x 36
52 x 30
52 x 24
52.00
52.00
52.00
52.00
52.00
52.00
50.00
48.00
42.00
36.00
30.00
24.00
28.00
28.00
28.00
28.00
28.00
28.00
54 x 52
54 x 48
54 x 42
54 x 36
54 x 30
54 x 24
54.00
54.00
54.00
54.00
54.00
54.00
52.00
48.00
42.00
36.00
30.00
24.00
28.00
28.00
28.00
28.00
28.00
28.00
56 x 54
56 x 48
56 x 42
56 x 36
56 x 30
56 x 24
56.00
56.00
56.00
56.00
56.00
56.00
54.00
48.00
42.00
36.00
30.00
24.00
28.00
28.00
28.00
28.00
28.00
28.00
58 x 56
58 x 54
58 x 48
58 x 42
58 x 36
58 x 30
58.00
58.00
58.00
58.00
58.00
58.00
56.00
54.00
48.00
42.00
36.00
30.00
28.00
28.00
28.00
28.00
28.00
28.00
60 x 58
60 x 54
60 x 48
60 x 42
60 x 36
60 x 30
60.00
60.00
60.00
60.00
60.00
60.00
58.00
54.00
48.00
42.00
36.00
30.00
28.00
28.00
28.00
28.00
28.00
28.00
End-to-End
Length
H
24
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SP-75
MSS
STANDARD PRACTICE
SP-75
ANNEX A
Referenced Standards and Applicable Dates
This Annex is an integral part of this Standard Practice and is placed after the main text for convenience.
Standard Name
ASME; ANSI/ASME
B16.9-2012
B31
B31.8-2012
BPVC-2013
Section V-2013
Section VIII, Div. 1-2013
Section IX-2013
ASTM
A370-13
A991/A991M-10
Description
Factory-Made Wrought Buttwelding Fittings
Code for Pressure Piping
Gas Transmission and Distribution Piping Systems
Boiler and Pressure Vessel Code (2013 edition)
Nondestructive Examination
Rules for Construction of Pressure Vessels
Welding, Brazing, and Fusing Qualifications: Qualification Standard for
Welding, Brazing, and Fusing Procedures; Welders; Brazers; and Welding,
Brazing and Fusing Operators
Standard Specification for:
Standard Test Methods and Definitions for Mechanical Testing of Steel Products
Standard Test Method for Conducting Temperature Uniformity Surveys of
Furnaces Used to Heat Treat Steel Products
The following organizations appear on the above list or are generally referenced within this Standard Practice:
American Petroleum Institute
1220 L Street, N.W.
Washington, D.C. 20005-4070
ASME
American Society of Mechanical Engineers (ASME International)
Two Park Avenue
New York, NY 10016-5990
ASTM
ASTM International
100 Bar Harbor Drive, P.O. Box C700
West Conshohocken, PA 19428-2959
MSS
Manufacturers Standardization Society of the Valve and Fittings Industry, Inc.
127 Park Street, NE
Vienna, VA 22180-4602
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API
25
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MSS
STANDARD PRACTICE
SP-75
APPENDIX X1
This Appendix is supplementary and does not include mandatory requirements.
SUPPLEMENTARY REQUIREMENTS
The supplementary requirements SR-1 through SR-22 are not applicable to product furnished to this Standard
Practice, except when specified on the purchase order or otherwise agreed upon. The expense or cost of
supplementary requirements shall be for the purchaser’s account unless specified on the purchase order or
otherwise agreed upon. When specified or agreed upon, supplementary requirements shall have the same force
as requirements of the first seventeen sections of this Standard Practice. To be applicable, supplementary
requirement details different from those of the SRs of this appendix must be agreed upon by both the purchaser
and manufacturer.
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When a supplementary requirement is incorporated in the base standard or dropped the number will be retired
and other supplementary requirement numbers will be retained.
a) SR-1
Longitudinal-Bead Underbead Cracking Test in accordance with Appendix X2. Tests shall be
performed on each heat of material (either from the starting material or a fitting).
b) SR-2
Transverse Guided-Weld Bend-Tests shall be performed in accordance with Section 10 on each
lot of fittings produced.
c) SR-3
Deleted – Transverse weld tensile test is part of SP-75, Section 8.6.
d) SR-4
Fittings intended for sour service should be identified by the purchaser at time of order including
testing and acceptance criteria.
e) SR-5
Actual yield strength of base material shall not exceed the specified minimum yield strength by
more than 20,000 psi.
f) SR-6
Notch-toughness requirements other than those specified shall be agreed upon between the
purchaser and the manufacturer.
g) SR-7
Deleted – Notch toughness tests are part of SP-75, Section 11.
h) SR-8
Each fitting shall be ultrasonically examined. Personnel and procedures shall be qualified in
accordance with ASME Boiler and Pressure Vessel Code, Section V, Article 5. Acceptance
standards shall be as agreed upon between the purchaser and the manufacturer.
i) SR-9
Fittings furnished in accordance with this Supplementary Requirement shall have purchase order
identification marked with low-stress die stamps or interrupted-dot stamps.
j) SR-10
More restrictive chemical requirements and/or a lower Carbon Equivalent shall be as agreed to
by purchaser and manufacturer.
k) SR-11
Repair Welding – Base metal repair welding may be performed subject to purchaser approval.
l) SR-12
Bar Stock Fittings – Bar Stock Fittings shall not be permitted.
26
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MSS
STANDARD PRACTICE
SP-75
APPENDIX X1 (Continued)
m) SR-13
A deposited weld-metal chemical analysis shall be performed for each classification of filler metal
or each filler metal/flux classification identified in the WPS. Chemical analysis shall be furnished
upon request.
n) SR-14
Butt-welding ends of fittings shall be subjected to liquid-penetrant or magnetic-particle
examination. The purchaser shall specify acceptance limits. Nondestructive-examination
personnel and procedures shall be qualified in accordance with ASME Boiler and Pressure Vessel
Code, Section V.
o) SR-15
Ultrasonic examination of butt welds in lieu of the radiographic examination specified in Section
15.1. Ultrasonic examination shall be in accordance with Article 4 of ASME Boiler and Pressure
Vessel Code, Section V. Longitudinal weld seams shall meet the Appendix 12 acceptance
standards of ASME Boiler and Pressure Vessel Code, Section VIII, Division 1.
p) SR-16
Simulated Post-Weld Heat Treatment (PWHT) of mechanical test coupons. Details of the PWHT
thermal cycle shall be furnished by the purchaser and the extent of mechanical testing required
shall be as agreed upon between the purchaser and manufacturer.
q) SR-17
Notch-toughness tests on the weld heat affected zone shall be performed on each lot in accordance
with requirements of Sections 11.1 and 11.2. Impact retest as per Section 11.4.
r) SR-18
Substitution of wall thickness for yield strength in accordance with Section 8.1.1 shall not be
allowed unless approved by the purchaser.
s) SR-19
In addition to the CMTR required for each lot of fittings, copies of the starting raw material mill
certification shall be furnished with the documentation package.
t) SR-20
In addition to the CMTR required for each lot of fittings, copies of the heat treat charts shall be
furnished with the documentation package.
u) SR-21
In addition to the CMTR required for each lot of fittings, copies of the lab stress strain curves and
tensile test results shall be furnished with the documentation package.
v) SR-22
Each quench and tempered fitting shall be individually hardness tested and the results reported on
the CMTR for each fitting.
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MSS
STANDARD PRACTICE
SP-75
APPENDIX X2
This Appendix is supplementary and does not include mandatory requirements unless invoked by SR-1 of
Appendix X1.
LONGITUDINAL – BEAD UNDERBEAD CRACKING TEST
Specimen Size – 2 in. wide, 3 in. long, in direction of rolling, full thickness (t) of material. Grit blast to obtain
uniform surface.
Weld Bead – Deposit bead 1.5 in. long on surface of specimen (see Figure X2-1 below).
Electrode – Deposit with a 0.12 in. diameter, E6010 electrode, at a current of 100 amperes and 24 to 26 volts,
speed of 10 in. per minute (energy input of 15,000 joules per inch).
Pre-tempering – Preheat or precool to 100 °F.
Post Treatment – Hold specimen after welding for 24 hours, at room temperature, approximately 100 °F and
then normalize at 1650 °F ± 25 °F for one hour. This serves to normalize the microstructure and stress relieves
simultaneously.
Examination – Saw cut so as to expose center of weld bead and prepare sawed surfaces using 240 grit wet belt
grinder. Inspect by wet fluorescent magnetic particle technique. Measure lengths of cracks developed and
express as percentage (%) of bead length. An average of 50% cracking or less for an average of 10 specimens
at the specified temperature is considered acceptable for welding since it has been found that such procedures
seldom cause cracking in full size girth welds.
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FIGURE X2-1
Longitudinal-Bead Underbead Cracking Test Specimen
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MSS
STANDARD PRACTICE
SP-75
APPENDIX X3
This Appendix is supplementary and does not include mandatory requirements.
RECOMMENDATIONS FOR SEGMENTING
Because of the residual stresses in an elbow due to heat treatment or body sizing, or the heat put into cutting in
the field, elbows may have a tendency to spring when cut such that the 1% OOR is no longer met. Such spring
back shall not be cause for rejection of the elbow unless otherwise agreed between the manufacturer and
purchaser. Any resulting mismatch on either the outside or inside diameter needs to be corrected in the field by
grinding, back-welding or bridging of weld to meet the appropriate piping code requirements for fit-up.
1.0 The following recommendations should be considered:
A) Purchase the desired segments required.
C) Order segments of varying degrees with the intent of using where possible and cold bending pipe
to make up small differences in degrees of bend needed.
D) If cutting in the field is necessary, welding of a short segment of transition pipe to the cut end is
recommended. This will result in better control of the fit-up and any grinding or back welding to
transition the weld will be easier to make. Then the elbow can be installed in the ditch with a
pipe to pipe weld which is easier to make using line-up clamps. A maximum of two cuts per
elbow should be made leaving a factory end for one weld.
NOTE: The above recommendations are in descending order of ease of use in the field.
2.0
Some pipeline companies have ordered their elbows with short pipe transitions on each end to ensure pipe
to pipe welds in the field in all cases. This can be done on all elbows including segments.
3.0
It should be recognized that elbows will usually have thicker walls than the mating pipe and that the extra
wall could be positioned to the inside diameter. This extra wall can be used to help prevent the elbow from
springing when heat treated or cut and will help offset the out-of-round by allowing transition grinding or
back welding.
4.0
Even with 1% out-of-round, cut elbows can still have difficulty in maintaining the maximum offset allowed
by code around the entire circumference. In most cases, the elbow was produced with a uniform
circumference throughout the elbow and with some minimal mechanical “jacking” in the field can be
rounded to make a good fit with minimal stress on the resulting girth weld. This should be discussed with
the contractor prior to start of construction and guidelines for such corrections should be set.
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B) Arrange with manufacturer to cut desired segments from rough elbows produced for the job once
the angle has been determined by the field. The timing of providing such elbows should be by
agreement.
Listing of MSS Standard Practices (as of September, 2014)
TITLE
SP-6-2012
SP-9-2013
SP-25-2013
SP-42-2013
SP-43-2013
SP-44-2010
SP-45-2003
SP-51-2012
SP-53-2012
SP-54-2013
SP-55-2011
SP-58-2009
SP-60-2012
SP-61-2013
SP-65-2012
SP-67-2011
SP-68-2011
SP-70-2011
SP-71-2011
SP-72-2010a
SP-75-2014
SP-78-2011
SP-79-2011
SP-80-2013
SP-81-2013
SP-83-2006
SP-85-2011
SP-86-2009
SP-87-1991
SP-88-2010
SP-91-2009
SP-92-2012
SP-93-2014
SP-94-2008
SP-95-2014
SP-96-2011
SP-97-2012
SP-98-2012
SP-99-2010
SP-100-2009
SP-101-2014
SP-102-1989
SP-104-2012
SP-105-2010
SP-106-2012
SP-108-2012
SP-109-2012
SP-110-2010
SP-111-2012
SP-112-2010
SP-113-2012
SP-114-2007
SP-115-2010
SP-116-2011
SP-117-2011
SP-119-2010
SP-120-2011
SP-121-2006
SP-122-2012
SP-123-2013
SP-124-2012
SP-125-2010
SP-126-2013
SP-127-2014a
SP-128-2012
SP-129-2014
SP-130-2013
SP-131-2010
SP-132-2010
SP-133-2010
SP-134-2012
SP-135-2010
SP-136-2014
SP-137-2013
SP-138-2009
SP-139-2014
SP-140-2012
SP-141-2012
SP-142-2012
SP-143-2012
SP-144-2013
SP-145-2013
SP-146-2014
SP-147-2014
SP-148-2014
Standard Finishes for Contact Faces of Pipe Flanges and Connecting-End Flanges of Valves and Fittings
Spot Facing for Bronze, Iron, and Steel Flanges
Standard Marking System for Valves, Fittings, Flanges, and Unions
Corrosion-Resistant Gate, Globe, Angle, and Check Valves with Flanged and Butt Weld Ends (Classes 150, 300 & 600)
Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications
Steel Pipeline Flanges (incl. 2011 Errata Sheet)
(R 2008) Bypass and Drain Connections
Class 150LW Corrosion Resistant Flanges and Cast Flanged Fittings
Quality Standard for Steel Castings and Forgings for Valves, Flanges, Fittings, and Other Piping Components – Magnetic Particle Examination Method
Quality Standard for Steel Castings and Forgings for Valves, Flanges, Fittings, and Other Piping Components – Radiographic Examination Method
Quality Standard for Steel Castings for Valves, Flanges, Fittings, and Other Piping Components – Visual Method for Evaluation of
Surface Irregularities (ANSI-approved American National Standard)
Pipe Hangers and Supports – Materials, Design, Manufacture, Selection, Application, and Installation (incorporates content of SP-69, 77, 89, and 90)
(ANSI-approved American National Standard)
Connecting Flange Joints between Tapping Sleeves and Tapping Valves
Pressure Testing of Valves
High Pressure Chemical Industry Flanges and Threaded Stubs for Use with Lens Gaskets
Butterfly Valves
High Pressure Butterfly Valves with Offset Design
Gray Iron Gate Valves, Flanged and Threaded Ends
Gray Iron Swing Check Valves, Flanged and Threaded Ends (incl. 2013 Errata Sheet)
Ball Valves with Flanged or Butt-Welding Ends for General Service
High-Strength, Wrought, Butt-Welding Fittings
Gray Iron Plug Valves, Flanged and Threaded Ends
Socket Welding Reducer Inserts
Bronze Gate, Globe, Angle, and Check Valves
Stainless-Steel or Stainless-Steel-Lined, Bonnetless, Knife Gate Valves with Flanged Ends
Class 3000 Steel Pipe Unions Socket Welding and Threaded
Gray Iron Globe & Angle Valves, Flanged and Threaded Ends
Guidelines for Metric Data in Standards for Valves, Flanges, Fittings, and Actuators (Incl. 2011 Errata Sheet)
(R 1996 – Reinstated 2011) Factory-Made Butt-Welding Fittings for Class I Nuclear Piping Applications
Diaphragm Valves
Guidelines for Manual Operation of Valves
MSS Valve User Guide
Quality Standard for Steel Castings and Forgings for Valves, Flanges, Fittings, and Other Piping Components – Liquid Penetrant Examination Method
Quality Standard for Ferritic and Martensitic Steel Castings and Forgings for Valves, Flanges, Fittings, and Other Piping Components – Ultrasonic Examination Method
Swage(d) Nipples and Bull Plugs
Guidelines on Terminology for Valves and Fittings
Integrally Reinforced Forged Branch Outlet Fittings – Socket Welding, Threaded, and Buttwelding Ends
Protective Coatings for the Interior of Valves, Hydrants, and Fittings
Instrument Valves
Qualification Requirements for Elastomer Diaphragms for Nuclear Service Diaphragm Valves
Part-Turn Valve Actuator Attachment – FA Flange and Driving Component Dimensions and Performance Characteristics
(R 2001) Multi-Turn Valve Actuator Attachment – Flange and Driving Component Dimensions and Performance Characteristics
Wrought Copper Solder-Joint Pressure Fittings
Instrument Valves for Code Applications
Cast Copper Alloy Flanges and Flanged Fittings: Class 125, 150, and 300
Resilient-Seated Cast Iron Eccentric Plug Valves
Weld-Fabricated Copper Solder-Joint Pressure Fittings (incl. 2012 Errata Sheet)
Ball Valves Threaded, Socket-Welding, Solder Joint, Grooved and Flared Ends (incl. 2010 Errata Sheet)
Gray-Iron and Ductile-Iron Tapping Sleeves
Quality Standard for Evaluation of Cast Surface Finishes – Visual and Tactile Method. This SP must be used with a 10-surface, three dimensional Cast Surface
Comparator, which is a necessary part of the standard. Additional Comparators available separately.
Connecting Joints between Tapping Machines and Tapping Valves
Corrosion Resistant Pipe Fittings Threaded and Socket Welding Class 150 and 1000 (ANSI-approved American National Standard)
Excess Flow Valves, 1¼ NPS and Smaller, for Fuel Gas Service
Service-Line Valves and Fittings for Drinking Water Systems
Bellows Seals for Globe and Gate Valves
Factory-Made Wrought Belled End Pipe Fittings for Socket-Welding
Flexible Graphite Packing System for Rising Stem Valves – Design Requirements
Qualification Testing Methods for Stem Packing for Rising Stem Steel Valves
Plastic Industrial Ball Valves
Non-Ferrous Threaded and Solder-Joint Unions for Use with Copper Water Tube
Fabricated Tapping Sleeves
Gray Iron and Ductile Iron In-Line, Spring-Loaded, Center-Guided Check Valves
In-Line, Spring-Assisted, Center-Guided Check Valves (Carbon, Alloy Steel, Stainless Steel, & Nickel Alloys)
Bracing for Piping Systems: Seismic-Wind-Dynamic Design, Selection, and Application
Ductile Iron Gate Valves
Copper-Nickel Socket-Welding, Fittings, and Unions
Bellows Seals for Instrument Valves
Metallic Manually Operated Gas Distribution Valves
Compression Packing Systems for Instrument Valves
Excess Flow Valves for Low Pressure Fuel Gas Appliances
Valves for Cryogenic Service, including Requirements for Body/Bonnet Extensions
High Pressure Knife Gate Valves
Ductile Iron Swing Check Valves
Quality Standard for Positive Material Identification of Metal Valves, Flanges, Fittings, and Other Piping Components
Quality Standard Practice for Oxygen Cleaning of Valves & Fittings
Copper Alloy Gate, Globe, Angle, and Check Valves for Low Pressure/Low Temperature Plumbing Applications
Quality Standard Practice for Preparation of Valves and Fittings for Silicone-Free Service
Multi-Turn and Check Valve Modifications
Excess Flow Valves for Fuel Gas Service, NPS 1½ through 12
Live-Loaded Valve Stem Packing Systems
Pressure Seal Bonnet Valves
Metal Ball Valves for Low Pressure/Low Temperature Plumbing Applications
High Pressure, Lug- and Wafer-Type, Iron and Ductile Iron Knife Gate Valves
Quality Standard for Steel Castings Used in Standard Class Steel Valves – Sampling Method for Evaluating Casting Quality
Low Pressure Flanged or Lugged Carbon Steel and Iron or Ductile Iron, Cast or Fabricated, Bonnetless, Knife Gate Valves without Liners
(R YEAR) Indicates year reaffirmed  Price List Available Upon Request  MSS is an ANSI-accredited American National Standards developer
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Manufacturers Standardization Society of the Valve and Fittings Industry, Inc.
127 Park Street, NE, Vienna, VA 22180-4620 • (703) 281-6613 • Fax # (703) 281-6671
Provided by IHS
No reproduction or networking permitted without license from IHS
Licensee=Servicios Maritimos de Campeche, S.A, de C.V/5970345002, User=DE CAMPEC
MSS-IHS
SP-75-2014
Not for Resale, 11/20/2014 09:30:52 MST